Has anybody missed a whole period or had a really late period because of stress?

I have been very overwhelmed, haven’t been eating much and having insomnia because of my work schedule and my period has been late the last couple of months however this is the first time that my period has been really late. I took a pregnancy test and it came back negative so I’m hoping that my period is late simply because of stress. Has anyone else had this happen to them before?

I am also 20 years old